Barrel for spring air-guns



(No Model.)

C. J. HAMILTON.

- BARREL FOR SPRING AIR GUNS. No. 427.313. v Patented May 6,1890.

Witwq EEEEE. I I I lvp/euqtur & C. W Clarencrzlfiirqiltuq- UNITED STATES LQL W CLARENCE J. HAMILTON, OF PLYMOUTH, MICHIGAN.

BARREL FOR SPRING AIR-GUNS.

SPECIFICATION forming part of Letters Patent No. 427,313, dated. May 6, 1890.

Application filed August 19, 1889. Serial No. 321,258. (No model.)

To all whom it may concern Be it known that I, CLARENCE J.HAM1L- TON, a citizen of the United States, residing at Plymouth, in the county of Vayne and State of Michigan, have invented certain new and useful Improvements in Barrels for Spring Air-Guns, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to new and useful improvements in the manufacture of barrels for spring air-guns; and the invention consists in the p eculiar method employed for uniting the false barrel in which the spring-airgun mechanism is secured to the true barrel, from which the bullet or dart is propelled, all as more fullyhereinafter described, andshown in the accompanying drawing, which represents a section through the false and true barrels as united iii-accordance with my invention, and in which- I A is the so-called false barrel, which is of large diameter to form an air-chamber and to contain the spi'ingactuated piston for compressing the air therein, the true barrel B being of small diameter and united thereto in the following manner: If the two barrels are made of brass, then the two ends which are to be united together are first coated with tin by dipping or otherwise thefalse barrel on the inside and the true barrel 011 the outside. Then suitable mandrels C and D are placed into the barrels, and the two barrels adjusted in relation to each other, as shown in the drawin g, which is to be the relation in which the two barrels are finally secured to each other.

The mandrel C in the false barrel has, pref erably, the convex end E, and the small mandrel in the true barrel the conical end F. Then a suitable mold Gis placed at the junction of the two barrels. A type-metal or other suitable fusible metal is poured into the mold to form the breech-block H, which, as will be seen, will firmly unite the two barrels and hold them in the proper relation to each other, while at the same time the conical seat F for the bullet is formed.

In making this class of goods heretofore the more expensive method of constructing the breech-block in a separate piece and then fitting the parts together has been employed, and the conical seat was generally formed by contracting the rear end of the true barrel. This was not only an expensive method, but it did not result in as substantial work as obtained by my present method, which is simple and inexpensive, furnishesa perfect airtight joint, which will withstand the force of the spring air-gun without becoming (1etached, and which firmly holds the two barrels in their proper relation and forms at the same time the seat for the bullet without requiring the previous contraction of the rear end of the true barrel.

It is obvious that the tinning is omitted if metals are used which unite without it.

WVhat I claim as my invention is The herein-described method of uniting the barrels of spring air-guns, which consists in first arranging the ends of two barrels of different diameter adjacent to but separated from each other, placing suitable mandrels of different diameter in the barrels, extending.

their ends beyond the same and into contact with each other, incasing the ends of the barrels and mandrels in suitable molded metal, and finally removing the mandrels, substantially as described.

In testimony whereof I affix my signature, in presence of two witnesses, this 3d day of August, 1889.

CLARENCE J. HAMILTON.

Witnesses:

Gno. A. GREGG, E1). MOBREARTY. 

